Roof structure



, structure.

Patented Dec. 26, 1944 -ROOF STRUCTURE John A. Robertson, Deerfield,` Duncan S. Payne,

i Chicago, and Beach FrederickAi-endt, Park Ridge, Ill., assignors to` United ,StatesGypsum i Company, Chicago, Ill., akcorporatonof 111i- Application August 2, 1943, Serial No. `497,02@ i 4 Claims. *(Cl. 1Ilm8-1) This invention pertains to a roof construction i and `particularly to a` special type of a combination of supports, and sheet-like members which when assembled will form a suitable deck for further application of roof coverings or the like.

In the construction of ordinary roofstructures, it is `customary to have the rafters meet `at the apeX of a common ridge rafter. other ends of the rafter are supported by the plates, which `in turnare an integral part of the Applied transversely tothe rafters are a series of tongue and groove or shiplapped edge boards which are fastened in the customary manner by means of nails to therafters. Though it is considered good practice to apply the tongue and groove or shiplapped edge board in a di agonal method, `since itigreatly reinforces the ent types of roofs and offers a number of econ` omies, as well as erection advantages.

Of course, the

complementary nature, which t into the recesses provided on the special purlin ligure.

This construction system is a combination of a number of elements, `each cooperating with the other `in order `to form a roof deck possessing strength, easepf erectiomlow cost of erection,

littlewaste, and` other advantages which will become apparent to those` skilled in this art. linl `roof structure, the customary method, however, i

erecting this construction, a ridge rafter I0 is` generally erected in place by means of temporary supports not shown. in Vthe drawing. To this ridge rafter It are attached at suitable distances apart a series of supporting rafters, I Za, Izb, I2C,v

, etc.

`The lower part `of the supporting rafters, I2a, lbiand I2c are `attached to a plate not shown on the drawing, as used in customary construction. Transverseiy overlying the supporting i rafters are a series of equally spaced apart, `espef Likewise the distance between the `rafters I2a,

I2b, I2C, is a fractional multiple of the length of the sheet-likemember I6.

Theusheet-like members or wallboard having `fthe special recessed edges 28 and 30 are. placed 'Though `this roof construction is specifically` directed tothe use of a particular type of wallboard or a laminated structure, possessing theA features described herein below, in combination With the special types of purlins, as applied to the roof rafters, it obviouslyl can be adapted to n e `40 a number of other modifications, extensions and constructions, which a"person skilled inthe art can readily foresee, particularly in light of the spirit of the principles underlying in this invention, as described in the drawing forming a part hereof. Y

Fig.` 1 shows partly in section the supporting roong structure, as well as the sheet-like members in place, together with the covering. Fig. 2

is a section taken along line I--I showing a part i by means of nails or other types of fastening de-i` between the purlins 14a and` Illb in such a manner that thelower part of said sheet is supported directly by the rafters I2 and also is suspended freely in the space between the rafters by being partiysupportable bythe proJection 28 forming an integral part of the sheet-like member It and engaging the recess 26 of the purlin III.

'Though it is possible to attach the sheet-like f member 1 6 tothe recess 26 by means of nails or f other suitableattaching means, such as adhesive,

it is not the intention to form this feature a part of the invention, since fasteningI by means ofnails along the edges of the projection 28 to the purlin I4 has a tendency to destroy the projection 28 and thereby prevent the salvage of the material for furtheruse. In addition, it has been found that when the projections 28 are fastened vices, the purlins I4 when exposed to highly humid conditions have` a tendency to twist and thereby destroy the projecting V,edge 2E of the sheet-like member I6. However, the sheet-like member I6 is fastened by means of nails 20 directly to the supporting rafters I2. The `attaching means 20 are covered by a covering means I8 Though it is desirable to cover the nail heads 2li i' with some other Waterproofing materiaLfsuch as asphalt o-r a lapping cementl of an a lialtic` nature, it is not entirely necessary;- been found that the nail hfdizlli'vvhy inserted will maintain suffiji pv vent the entrance of rain to ndrlyin'g's'tricture.

able Wallboard having a longitudinal margin` of, projections 28 and the recess 30 Which`i`s c'on-V plementarly to the edges 12'6 j"of fthe-longitudinal marginspf-ftlie purli-n'sll. EThe,slieetL-lilie mem#- berrconsistsiof La laminated structur'efcompris'ing at-'-'1east'V twolsheets@ the-flowermost "of u-th'e= said Sheetsubbeingfotrsuch alwidth which Willl'tbe tweerr the r-lwidestelongitudinal .marginsA -ofl the purlin Uli 'and I'Which-F will r =bel-directly-incontact; with-thel rafter `l-2,fwhile tha-upper. 'sheet-isl of such Widthl which fwill 'fit" between them'arginal recesses -2-6- zo:fthe' purlins f Mr' `Any suitable particularly suitable `for use;l underfhumid :foon-'- ditionsfand can be; used-'conveniently inthis .type

. of-` structure.;- However;` it` is -not yintended 1 to belimitedfto-that particular laminatedI structure,l forobviously the flowervmost sheet-is in support-f.

able contactwth the rafterflZ and therebywdoes not vneedfthesuperior,.-adfhesivestrength`r andi character Which would beg desirabler innfsheets which are normallyv suspended along their lmarginaliedges, andends.-

In erecting the substructure Vorffthis irn'reriticn,V

members'vvl fall `over agcommon rafterain the, samer-course. rHoWeveL--thel succeedingv`- coursesl andfin/particular theadjacent; courses should notaha've the ends `ofthe sheetflike'fmember16;: 'failover a common rafter-in4 alignment with each,l other. A staggeredyor broken j ointfpanely system of erectionisghi'ghly desirable, forli-not but also reinforces achfsucceedingcouijse `als/ it is appldft'o" 'the supportingsheetflike structure Wherebyja rigid,

ments underlying this invention will show that each element cooperates with each other to form a combination which When assembled in ,accordance with principles underlying this invention as dened hereinabove, and claimed in the appended claims will provide a roofing structure withv llnexleted .and ngyel. prever. 'es as Well as t 'r advantages: l "l e' "It" 'is claimed:

1. In a roof deck, in the combination with `supporting rafters spaced apart a multiple fractticn^ off-'the length of the sheet-like member, a

purlin having substantially an inverted T sec- "ire'"ed'transversely of the said supporting er u'dinal marginal edges of the gfa complementary load supm 'por a e"`rcs`s' tffngage in juxtaposition alike l 'complementary longitudinal load transmittable The vsheet-like members may consist of a'suit-A' `rqlgilffil'llliliElCtrl fOImirlg the upper Daft 0f edges of said sheet-like members, the lower surf'bf' said sheet-like member supported partly by-lthe supporting rafters,` the` endsoffsai'd sheetlikemmember's; abuttingc'overca 4'comi-non' rpafter` irrthe same-course and oni-other-rafters in ad? jacent courses, but-betwe n` said.purlins;-the said the-rafters.l r f W2; -In la'roofV structure `comprising supporting rafters; a-series ofy spaced purlins attached;-trans;l versely to said supporting rafters, the said purpurlins and saidA sheet-like -members attached to lins having ra longitudinal, marginaljrecessjgtq receiveV ther upper edge marginalV portions of, laminated Wallboard;` a: laminated Wallboard: structure'comprising sheet-like' members made fromn gypsum;l beror `the Ilka placed in ,a face.

to Nface relationship, the upper lportion Qi said laminated structurebeing Wider-than the other, p

andbeing of"` such Width as to be engaged Within thenlongitudinal, marginal, recesses of s aili transversely spaced. purlins; ,the'lower pgrtionj of,-said 'laminated structure` disposedbeiyvvpen Sadxpurlns, 'and Supportedjby Said rafters; a' coveringmeans for the said purlins andlamie' hated: Structure, and" means for attaching4 said.. Covering means t0 Said.. Purline,4 and.' laminated'.

tight weather resistant Construction. is. internen-i y3. In the structure of claim 2, vwherein the` Said t laminated sheet-like members consist.. '0f laminated gypsurrrwallbarslv *4,- :Irr the, Construct@ Ot Claim .2, wherein tha., Saislf.,larrrirlatfrl"rialllanrdY Structure, Comp. at least two 'Sheets Qfwallbgarsi, areadhesi lr; seurd by memset. a Water resistant adhesive.. Consisting@ 'rartiallr dextrirriretrarlaa@ pasteA agdiarr.asphaltemlrlsiorw the clay. rpg# Joan.. A, Roannrson.. e DUNCAN-, Barna: e f B.. ARENDTL; 

